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Power Plant
DA20-C1 AMM
Page 4
23 Jun 2004 71-00-00 Doc # DA201-C1
Rev. 10
E. Heat-Shield
Two brackets attach a steel heat shield to the engine. The heat shield holds the electrical
cables. It also holds the main fuel feed hose and the fuel return hose. The heat shield gives
protection to the fuel pipes and electrical cables.
F. Engine Drain Pipes
Each cylinder inlet port has a drain pipe. The drain pipe connects from the cylinder head to a “T”
piece connector. From the “T” piece connector the drain pipes connect to a single pipe. The
pipe has a check valve installed.
An aluminum drain pipe attached to the mixture control valve gives drainage for the fuel pump.
On aircraft equipped with an altitude compensating fuel pump, an aluminum pipe connects the
static reference port of the fuel pump to a “T” connector in the fuel pump drain line.
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 12 71-00-00 Page 5
1 Nov 2007
Engine Specifications
The operational limits and specifications recorded in this section are applicable to the IO-240B
Series airplane engines. Refer to the IO-240B Operator and Installation Manual, form X30620 for
operating data.
ITEM DATA
Compression ratio: 8.5: 1
Firing order: 1-3-2-4
Number of cylinders: 4
Bore: 4.44 in (112.7 mm)
Stroke: 3.88 in (98.5 mm)
Piston displacement: 240 cu in (3932.9 cu cm)
Brake Horsepower:
Rated Maximum Continuous Operation
Recommended for Cruise
125 HP @ 2800
95 HP @ 2550
Crankshaft Speed:
Rated Maximum Continuous Operation
Minimum full power ground static rpm
Idle
2800
2100
1000 ± 25
Intake Manifold Pressure at Idle: (18.5 In. Hg): Max
Fuel Control System: Continental Continuous Flow Injector
Fuel: For Fuel grade: Refer to the Teledyne
Continental Maintenance Manual
Oil: For Oil grade: Refer to the Teledyne Continental
Maintenance Manual
Oil Pressure:
Idle (Minimum pressure)
Normal Operation
Maximum (Cold)
10 psi (1.45 Kpa)
30 - 60 psi (4.35 - 8.7 Kpa)
100psi (14.5 Kpa)
Oil Sump Capacity IO-240-A/B: 6 U.S. Qt (5.67 Liters)
Maximum Oil Consumption: 0.5 US qt/hr (0.47 liters/hr) maximum.
Power Plant
DA20-C1 AMM
Page 6
09 Aug 2001 71-00-00 Doc # DA201-C1
Rev. 7
ITEM DATA
Oil Temperature Limits:
Minimum for Take-Off
Maximum Allowable
Cruise
75°F (24°C)
240°F (115.6°C)
170°F - 220°F (76°C - 93°C)
Cylinder Head Temperature:
Recommended Max at Cruise
Limit
* Bayonet Thermocouple AS234 with AS236
adapter.
380°F (193°C)
460°F (237°C)
Ignition Timing (Compression stroke, breaker
opens):
Right Magneto, degrees BTC (IO-240B)
Left Magneto, degrees BTC (IO-240B)
26° ± 1°
26° ± 1°
Spark Plugs:
The following Spark Plugs are approved for
use in IO-240B engines
Spark Plug Gap:
TCM 630049
Champion RHM 38E
You must use the manufacturers specified spark
plug gap.
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 0 71-00-00 Page 101
19 Dec 1997
TROUBLE-SHOOTING
1. General
The table below lists the defects you could have with the Power Plant. It does not give trouble
shooting data for the engine or the engine systems. Refer to the Teledyne Continental
Maintenance Manual for engine and engine system trouble-shooting.
If you have the trouble detailed in the Trouble column read across to the Possible Cause column.
Then do the repair in the Repair column.
WARNING: YOU MUST BE CAREFUL WHEN YOU DO POWER PLANT TROUBLE
SHOOTING. OPERATION OF A DAMAGED ENGINE CAN CAUSE
MORE DAMAGE TO THE ENGINE. THIS CAN CAUSE INJURY TO
PERSONNEL.
Trouble Possible Cause Repair
Engine vibration. Damaged shock mounts. Replace the shock mounts.
CAUTION: YOU MUST LET ALL THE FUEL DRAIN FROM THE INTAKE
SYSTEM. IF YOU DO NOT DO THIS, STARTING AN ENGINE WITH
A FLOODED INTAKE SYSTEM WILL CAUSE HYDROSTATIC LOCK.
THIS CAN CAUSE DAMAGE TO THE ENGINE.
Engine will not start with fuel
pressure indication.
Engine flooded - drain system
check-valve blocked.
Replace the check valve.
Power Plant
DA20-C1 AMM
Page 102
09 Aug 2001 71-00-00 Doc # DA201-C1
Rev. 7
Intentionally left blank
DA20-C1 AMM
Power Plant
Doc # DA201-C1
Rev. 9 71-00-00 Page 201
29 Apr 2004
MAINTENANCE PRACTICES
1. General
These maintenance practices tell you how to remove/install the engine.
　
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